The concentration of which gas is highest in our environment?
Oxygen
Hydrogen
Nitrogen
Carbon dioxide
50 practice sets · Page 3 of 3
The concentration of which gas is highest in our environment?
Oxygen
Hydrogen
Nitrogen
Carbon dioxide
Study of trends in human population growth and prediction of future growth is called
Demography
Biography
paleography
psychology
Sequence of eating and being eaten in a ecosystem is called
Food web
Natural cycle
Ecological Pyramid
Food chain
Region where fresh water meets salt water is called
Sea
Lake
River
Estuarine
Nutrients are recycled in ecosystem by
Biogeochemical cycle
Energy flow
Producers
Consumers
Noise is measured using sound meter and the unit is
Hertz
Decibel
Joule
Sound
Nitrogen gets oxidized into
Nitrates and ammonia
Ammonia and urea
Urea and nitrite
Nitrates and nitrites
Most stable ecosystem is
Forest
Desert
Ocean
Mountain
Major cause of increment in population growth
decrease in birth rate
decrease in mortality rate
illiteracy
none of the above
Lowest layer of atmosphere is called
Thermosphere
Stratosphere
Troposphere
Mesosphere